orthochromatic
Crossword Clue

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AnswerCrossword Clue
orthoorthochromatic
orthoshort for orthochromatic plate (a photographic plate)
orthosORTHO, short for orthochromatic plate (a photographic plate)
orthochromatismthe state of being orthochromatic, of photographic film, sensitive to all colours except red
orthochromatic(of black-and-white photographic film) Sensitive to all visible light except red. Orthochromatic film can therefore be handled in red light in the darkroom but does not produce black-and-white tones that correspond very closely to the colors seen by the eye